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	function checkNavigator() {
		var frameSet = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">\n'
		+'<HTML>\n'
		+'	<META HTTP-EQUIV="Content-Type" CONTENT="text/html;CHARSET=iso-8859-1">\n'
		+'	<TITLE>Rose Web Publisher</TITLE>\n'
		+'<HEAD>\n'
		+'<frameset cols="25%,75%">\n'
		+'<frame marginwidth="0" marginheight="0" scrolling="NO" src="contents.html" name="categories_frame">\n'
		+'<frame src="webviewer/intro.html" name="contents_frame">\n'
		+'<noframes>\n'
		+'<P>This page is in frames, which your browser does not support.</P>\n'
		+'</noframes>\n'
		+'</frameset>\n'
		+'</HEAD>\n'
		+'</HTML>\n';

		var unsupported = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">\n'
		+'<HTML>\n'
		+'<HEAD>\n'
		+'	<META HTTP-EQUIV="Content-Type" CONTENT="text/html;CHARSET=iso-8859-1">\n'
		+'	<TITLE>Rose Web Publisher - Unsupported browser</TITLE>\n'
		+'</HEAD>\n'
		+'<BODY BGCOLOR="#FFFFFF">\n'
		+'<P><FONT SIZE="5"><B>Unsupported Browser</B></FONT></P>\n'
		+'<P><FONT SIZE="5"><B><BR></B>\n'
		+'<FONT SIZE="4">The following browsers are supported:</FONT></P>\n'
		+'<P><FONT SIZE="4">1. Microsoft\'s Internet Explorer 4.0 or better. </FONT><A HREF="http://www.microsoft.com/windows/ie">\n'
		+'<FONT SIZE="4">http://www.microsoft.com/ie</FONT></A></P>\n'
		+'<P><FONT SIZE="4">2. Netscape\'s Communicator 4.06 or better. </FONT><A HREF="http://www.netscape.com/download">\n'
		+'<FONT SIZE="4">http://www.netscape.com/download.</FONT></A><FONT SIZE="4">  If you wish to publish the images in PNG '
		+'format you will need to add PNG support to Netscape Communicator.  </FONT><A HREF="http://codelab.siegelgale.com/solutions/pnglive2.html">\n'
		+'<FONT SIZE="4">PNG Live</FONT></A><FONT SIZE="4"> is a plug-in that provides PNG support for Netscape Communicator. Netscape '
		+'Communicator 4.5 or better has built-in support for PNG and therefore does not require any special plug-in to view '
		+'web pages created by Rose Web Publisher.</FONT><A HREF="http://www.netscape.com/download"><FONT SIZE="4"></FONT></A></P>\n'
		+'<P><FONT SIZE="4"><BR>\n'
		+'</FONT>\n'
		+'</BODY>\n'
		+'</HTML>\n';

		var bOK = 0;

		if (navigator.appName.indexOf("Microsoft") >= 0) {
			if(navigator.appVersion.charAt(0) == '4')
				bOK = 1;
		} else if (navigator.appName.indexOf("Netscape") >= 0) {
			if((navigator.appVersion.charAt(0) == '4' && navigator.appVersion.charAt(2) == '0' && navigator.appVersion.charAt(3) >= '6') ||
			   (navigator.appVersion.charAt(0) == '4' && navigator.appVersion.charAt(2) >= '5') ||
			   (navigator.appVersion.charAt(0) > '4'))
				bOK = 1;
		}
		if (bOK == 1)
		{
			document.open("text/html", "replace");
			document.write(frameSet);
			document.close()
		}
		else
		{
			document.open("text/html", "replace");
			document.write(unsupported);
			document.close()
		}
	}
// -->
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